package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;


import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("common")
@Slf4j
public class CommonController {
     @Value("${reggie.path}")
    private  String path;
       /*
       * 上传三要素:  post请求,input表单提交数据类型为file,enctype类型为multipartfile
       * */
     @PostMapping("upload")
     public R<String> upload(MultipartFile file) throws IOException {
         File file1 = new File(path);
         if(!file1.exists()){
             file1.mkdirs();
         }
         String originalFilename = file.getOriginalFilename();
         String fileName = UUID.randomUUID()+ originalFilename.substring(originalFilename.lastIndexOf("."));
       file.transferTo(new File(path+fileName));

       return R.success(fileName);
     }

     @GetMapping("download")
    public void download(String name, HttpServletResponse response) throws IOException {
         //response.setHeader("Content-Disposition","attachment;filename=" + name);

         FileInputStream fis = new FileInputStream(new File(path+name));
         ServletOutputStream os = response.getOutputStream();
//         byte[] byes= new byte[1024];
//         int len;
//         while ((len=fis.read(byes))!=-1) {
//             os.write(byes, 0, len);
//         }
         IOUtils.copy(fis, os);
     }

}
